We had three issues in the same job.
The controller lost its program, as if using the “clear device” key
T3-TB Asix lost its program.
We replaced this device by one i had as spare part.
About 20 days later, it occured again with the new device.
We replaced it again with another one (spare part).
Abaut 40 days later and that’s fine.
Today it happens again, but this time, a T3-LB lost its program. This device has worked fine for 4 months.
This job has:
1 MT8701IE HMI (BACnet IP) with remote monitoring,
4 T3-TB Asix,
2 T3-LB Asix,
1 T3-BB Asix
The schedules are transfered from the HMI using data transfer timed based objects to VAR126 or 127. (5 seconds interval pulses). There is 6 schedules events (two on each T3-LB and one on each T3-TB).
All firmware are factory default:
T3-TB Asix - 46.2 (UO-5 ans UO-6 configured and working as AO)
T3-TB Asix - 46.5
T3-LB Asix - 46.5